气候变化领域集成服务门户(CCPortal): MICS-Asia III: Overview of model intercomparison and evaluation of acid deposition over Asia

CCPortal

DOI	10.5194/acp-20-2667-2020
	MICS-Asia III: Overview of model intercomparison and evaluation of acid deposition over Asia
	Itahashi S.; Ge B.; Sato K.; Fu J.S.; Wang X.; Yamaji K.; Nagashima T.; Li J.; Kajino M.; Liao H.; Zhang M.; Wang Z.; Li M.; Kurokawa J.; Carmichael G.R.; Wang Z.
发表日期	2020
ISSN	16807316
起始页码	2667
结束页码	2693
卷号	20 期号:5
英文摘要	The Model Inter-Comparison Study for Asia (MICS-Asia) phase III was conducted to promote understanding of regional air quality and climate change in Asia, which have received growing attention due to the huge amount of anthropogenic emissions worldwide. This study provides an overview of acid deposition. Specifically, dry and wet deposition of the following species was analyzed: S (sulfate aerosol, sulfur dioxide (SO2), and sulfuric acid (H2SO4)), N (nitrate aerosol, nitrogen monoxide (NO), nitrogen dioxide (NO2), and nitric acid (HNO3)), and A (ammonium aerosol and ammonia (NH3)). The wet deposition simulated by a total of nine models was analyzed and evaluated using ground observation data from the Acid Deposition Monitoring Network in East Asia (EANET). In the phase III study, the number of observation sites was increased from 37 in the phase II study to 54, and southeast Asian countries were newly added. Additionally, whereas the analysis period was limited to representative months of each season in MICS-Asia phase II, the phase III study analyzed the full year of 2010. The scope of this overview mainly focuses on the annual accumulated deposition. In general, models can capture the observed wet deposition over Asia but underestimate the wet deposition of S and A, and show large differences in the wet deposition of N. Furthermore, the ratio of wet deposition to the total deposition (the sum of dry and wet deposition) was investigated in order to understand the role of important processes in the total deposition. The general dominance of wet deposition over Asia and attributions from dry deposition over land were consistently found in all models. Then, total deposition maps over 13 countries participating in EANET were produced, and the balance between deposition and anthropogenic emissions was calculated. Excesses of deposition, rather than of anthropogenic emissions, were found over Japan, northern Asia, and southeast Asia, indicating the possibility of long-range transport within and outside of Asia, as well as other emission sources. To improve the ability of models to capture the observed wet deposition, two approaches were attempted, namely, ensemble and precipitation adjustment. The ensemble approach was effective at modulating the differences in performance among models, and the precipitation-adjusted approach demonstrated that the model performance for precipitation played a key role in better simulating wet deposition. Finally, the lessons learned from the phase III study and future perspectives for phase IV are summarized. © 2020 BMJ Publishing Group. All rights reserved.
关键词	acid deposition air quality anthropogenic source atmospheric pollution climate change long range transport regional climate wet deposition Far East
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132192
推荐引用方式 GB/T 7714	Itahashi S.,Ge B.,Sato K.,et al. MICS-Asia III: Overview of model intercomparison and evaluation of acid deposition over Asia[J]. Atmospheric Chemistry and Physics,2020,20(5).
APA	Itahashi S..,Ge B..,Sato K..,Fu J.S..,Wang X..,...&Wang Z..(2020).MICS-Asia III: Overview of model intercomparison and evaluation of acid deposition over Asia.,20(5).
MLA	Itahashi S.,et al."MICS-Asia III: Overview of model intercomparison and evaluation of acid deposition over Asia".20.5(2020).